书面表达。
假如你是某家英文报社的编辑，昨日收到一位中学生读者王丽的来信。请根据来信内容
和所给的要点提示用英语写一封回信。词数100左右。
Dear Editor,
I am a hardworking girl and want to be the number one in my class. But in the exams, I always make
mistakes that I should have avoided. I really worry about it. What can I do to improve my performance in exams?
Wang Li
提示：
1．不要压力太大；
2．如有问题，请教老师或同学；
3．考试时合理分配时间并尽量抽出几分钟检查。
注意：
1．可以适当增加细节以使行文连贯；
2．书信的开头和结尾已给出，但不计人总词数。
参考词汇：分配--distribute
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Dear Wang Li,
It's good that you know what prevents you achieving satisfying scores in exams. But remember, even
the very best can make mistakes sometimes. So, don't put too much pressure on yourself.
Learning from the errors you've made in the past exams is an effective way to avoid making the same
mistakes next time. If you have problems you cannot solve, turn to your teacher or classmates for advice.
When you attend the exam, plan how to distribute your time according to the number of questions.
Spare a few minutes to review your work in order that you can spot the silly mistakes.
Enjoy the challenge each new exam brings. I believe a good learning habit can eventually help you
gain success.
Editor
又n维向量α1，α2，α3线性无关，则α1+α2，α2+2α3，Xα3+Yα1线性相关的概率为______．